Abstract: A control system for an internal combustion engine which can judge and detect a failure of a valve timing changing unit regardless of operating conditions. The system includes a second storage unit 9 for storing the detection value of an actual valve timing detection unit 2 when the target advance angle set by a target advance angle setting device 3 is a predetermined value and updating the storage value, a storage value update inhibiting unit 10 for inhibiting the update of the storage value of the second storage unit when a change in the storage value updated by a first storage unit 4 is larger than a predetermined value, and failure judging unit 8A for judging a failure of the valve timing changing unit based on the target advance angle set, the detection value of the actual valve timing detection unit and the storage value of the second storage unit.

Abstract: A control device for an internal combustion engine includes a crank angle detecting device, which detects the crank angle of the internal combustion engine; a cam angle detecting device, which is installed in a variable cam shaft which variably rotates with respect to a crank shaft and detects a cam angle; a device for generating a cylinder identifying signal, which is separately located from the cam angle detector and generates the cylinder identifying signal, which identifies cylinders of the internal combustion engine; a device for varying valve timing, which varies the cam angle with respect to the crank angle; a valve timing controller, which controls the varying valve timing device; and a mechanism for controlling the internal combustion engine even when the cam angle detecting device is troubled because a control of supplying fuel and igniting is based on an identification of the cylinders by a signal from the device for generating the cylinder identifying signal.

Abstract: A valve timing control system comprises a learning means for learning the phase difference between the crank angle and the cam angle at a position where the variable valve timing means is stopped mechanically and a valve timing control variable calculating means for calculating a valve timing control variable, for driving the variable valve timing means, on the basis of a deviation between the phase difference value learned by the learning means and the phase difference calculated by the advance amount calculating means. The learning means learns the phase difference between the crank angle and the cam angle at the mechanically stopped position when the internal combustion engine is not idling. Thus, errors resulting from the operating force of a cam shaft are not included in the maximum retardation value, which ensures precise learning of the maximum retardation value and high-precision valve timing control.

Abstract: An engine controlling apparatus is provided in which a stable limp-home drive is possible even if an open breakdown of a throttle valve occurs. The apparatus includes a throttle breakdown detecting unit S1 for detecting the breakdown in a throttle controlling system including the throttle valve and a throttle opening degree sensor, a throttle power source interrupting unit S2 for interrupting a power source supply to a throttle actuator in the case where the breakdown in the throttle controlling system is detected, and a predetermined operational condition detecting unit S3 for detecting a shift of the operational condition to a predetermined operational condition corresponding to a fully closed condition of the throttle valve in operation of the throttle power source interrupting unit. A bypass controlling unit S4 opens the bypass valve to feed the air to the engine at the time when the predetermined operational condition is detected in operation of the throttle power source interrupting unit.

Abstract: To provide a deceleration controlling apparatus for an automotive vehicle, which may perform a deceleration control that is effective in a breakdown of a throttle valve kept opened, without increasing a cost, the deceleration controlling apparatus for an automotive vehicle, includes: an engine, an accelerator pedal and a brake system which are mounted on the vehicle; an automatic transmission connected to the engine; a throttle valve for adjusting an amount of intake air of the engine; an accelerator opening degree sensor for detecting an opening degree of the accelerator pedal to output an accelerator opening degree signal; a throttle valve controlling unit for electrically controlling an opening degree of the throttle valve in response to the accelerator opening degree signal; a throttle opening degree sensor for detecting an opening degree of the throttle valve to output a throttle opening degree signal; a throttle-open breakdown detecting unit S3 for detecting a breakdown of throttle-open of the throttle

Abstract: A fuel injection control apparatus for an internal combustion engine includes an injector control apparatus 120B for controlling a fuel injection amount toward a target fuel injection amount Fm. The injector control apparatus 120B includes an expected engine revolution number calculating means 9 for calculating an expected engine revolution number Nf for a predetermined interval based on the engine revolution number Ne, expected throttle opening degree calculating means 10 for calculating an expected throttle opening degree .theta.f for the predetermined interval based on a throttle opening degree .theta., expected drawn air amount calculating means 11 for calculating an expected drawn air amount Qf for the predetermined interval based on the expected engine revolution number and the expected throttle opening degree, and target fuel injection amount calculating means 12 for calculating a target fuel injection amount Fm.

Abstract: A device for controlling an automatic transmission and an engine for vehicles expanding a range of direct drive to improve fuel efficiency and decreasing the shock due to the transmission of torque at the time of acceleration or deceleration.

Abstract: The air introducing means comprising air pump for introducing air into exhaust pipe and heating device for heating the introduced air are provided. Both an air pump for introducing air into exhaust pipe and a heating device for heating the introduced air are provided. Heating device is connected to the control unit which causes it to stop heating when the temperature of the water for cooling engine exceeds a preset temperature. Idle rotation regulator for keeping the rotational speed of the engine at a level higher than the idling speed is also provided. Further provided is a control unit that actuates the idle rotation regulator when the engine is brought to idling while the heating device performs heating. If the rotational speed of the engine is increased while it is running at idle, more power is generated by dynamo to make up for the power consumption by the heating device.

Abstract: To improve the reliability and detecting capability of an apparatus for detecting abnormalities in a crank angle sensor, the apparatus comprises detection keeping devices which assumes that there is an air weight flow higher than a predetermined value for a predetermined interval after an output of the air volume sensor has fallen below a predetermined value, to enable abnormalities in the crank angle sensor to be detected with greater accuracy in spite of variations in air volume during cranking of the engine or after stopping of the engine.

Abstract: Exhaust gas cleaner system for an automotive internal combustion engine includes an air introduction pipe 8 for introducing secondary air, heated initially by a heater 23, to the catalytic converter unit 7 mounted on the exhaust pipe 3. The ignition timings of the engine is retarded at least during the time when the secondary air is heated by the heater 23. Preferably, the number of ignition timings are counted by a counter modulo 5, for example, in the case of a four-cylinder engine, and the ignition timings are retarded when the counter content is 3 or 4, such that the ignition timings of the cylinders are retarded intermittently. Alternatively, the retardation of the ignition timings may be terminated before the introduction of the heated secondary air is terminated.Where two first and second catalytic converter units 7a and 7b are provided, secondary air distributed by a change-over valve 10a is heated separately by heaters 23b and 23c.

Abstract: In an exhaust gas purification system for an internal combustion engine including a catalytic converter disposed in an exhaust pipe, an apparatus for controlling an amount and temperature of fresh air fed into the exhaust pipe so that optimal purification efficiency of the catalytic converter can realized. The apparatus includes an air pump for taking in fresh air, a control valve for controlling air flow, a heater for heating the air and the controller for controlling the pump, the valve and the hater in dependence on engine operation states so that nitrogen oxides, carbon monoxide and hydrocarbon contained in the exhaust gas can be removed to a maximum through reduction and oxidation reactions. An abnormality detecting device detects occurrence of abnormality in the air feeding control apparatus for ensuring fail-safe operation thereof.

Abstract: In an exhaust gas purification system for an internal combustion engine including a catalytic converter disposed in an exhaust pipe, an apparatus for controlling an amount and temperature of fresh air fed into the exhaust pipe so that optimal purification efficiency of the catalytic converter can realized. The apparatus includes an air pump for taking in fresh air, a control valve for controlling air flow, a heater for heating the air and the controller for controlling the pump, the valve and the hater in dependence on engine operation states so that nitrogen oxides, carbon monoxide and hydrocarbon contained in the exhaust gas can be removed to a maximum through reduction and oxidation reactions. An abnormality detecting device detects occurrence of abnormality in the air feeding control apparatus for ensuring fail-safe operation thereof.

Abstract: A fuel supply control system for an automotive engine determines a property of the fuel, such as the fifty percent distillation temperature T.sub.50 thereof, and the fuel injectors of the engine are controlled in accordance with the determined fuel property. When the engine is idling and the coolant water temperature WT of the engine is decreasing, the amplitude X of the feedback correction factor K.sub.2 for proportional-plus-integral control action is measured a number of times, and an average amplitude X.sub.0 thereof is calculated. The property of said fuel is determined on the basis of the thus calculated average amplitude X.sub.0 and the coolant water temperature WT using a two-dimensional map which gives the value of T.sub.50 as a function of the amplitude X of the feedback correction factor K.sub.2 and the coolant water temperature WT. The thus determined index T.sub.50 is stored in a RAM backed up by a battery. When a new fuel is supplied to the fuel tank, the value of index T.sub.

Abstract: Exhaust gas cleaner system for an automotive internal combustion engine includes an air introduction pipe 8 for introducing secondary air, heated initially by a heater 23, to the catalytic converter unit 7 mounted on the exhaust pipe 3. The ignition timings of the engine is retarded at least during the time when the secondary air is heated by the heater 23. Preferably, the number of ignition timings are counted by a counter modulo 5, for example, in the case of a four-cylinder engine, and the ignition timings are retarded when the counter content is 3 or 4, such that the ignition timings of the cylinders are retarded intermittently. Alternatively, the retardation of the ignition timings may be terminated before the introduction of the heated secondary air is terminated.Where two first and second catalytic converter units 7a and 7b are provided, secondary air distributed by a change-over valve 10a is heated separately by heaters 23b and 23c.

Abstract: The air introducing means comprising air pump for introducing air into exhaust pipe and heating device for heating the introduced air are provided. Both an air pump for introducing air into exhaust pipe and a heating device for heating the introduced air are provided. Heating device is connected to the control unit which causes it to stop heating when the temperature of the water for cooling engine exceeds a preset temperature. Idle rotation regulator for keeping the rotational speed of the engine at a level higher than the idling speed is also provided. Further provided is a control unit that actuates the idle rotation regulator when the engine is brought to idling while the heating device performs heating. If the rotational speed of the engine is increased while it is running at idle, more power is generated by dynamo to make up for the power consumption by the heating device.

Abstract: A drive unit of a conveyer having a frame structure extending from one place to another place, a step chain mounting thereon a plurality of step treads and arranged inside the frame structure and a step chain sprocket for driving the step chain, which drive unit comprises a reduction gear and a motor for driving and controlling the step chain sprocket through the reduction gear, and is characterized in that the whole upper side of the reduction gear is of an opening covered with a base plate, and that the base plate is formed by unifying a top cover for the opening of the reduction gear and a motor base through reinforcing ribs disposed therebetween so as to be parallel to each other, the motor being mounted on the base plate so as to be horizontally movable in a direction perpendicular to an output shaft of the motor.

Abstract: A light-polymerizable resin composition for the preparation of clasp patterns comprises (a) a light-polymerizable compound having at least one ethylenically unsaturated double bond, (b) an organic filler material, (c) a light polymerization initiator and (d) a reducing agent. The light-polymerizable compound is solid at normal temperature, and may be a mono- or polyfunctional acrylate or methacrylate.

Abstract: A casing assembly for electronic equipment comprising a printed circuit board on which an exothermic electronic component is mounted, a casing for covering the printed board, and a base for attaching the casing to a wall body or a rail. The base is of a high heat conductive material and has a planar structure which results in a large contact area between it and the wall body or rail. A high heat conductive plate like cushioning member made of an electrically insulative material is interposed between the board and the base in contact therewith. The heat generated in the electronic component is released through the printed board and lead wires and through the cushioning member and the base to the wall body or rail. Preferably, where the casing is attached to the rail, a guide latch member and a pressure latch member are attached to the base.

Abstract: A dental photopolymerizable type resin composition is provided, which comprises (a) a photopolymerizable compound that has therein at least one ethylenically unsaturated double bond and is a solid either crystalline or amorphous at 40.degree. C. or lower, (b) an inorganic filler, (c) a photopolymerization initiator, and (d) a reducing agent. That compound may be a mono- or poly-functional (meth)acrylate.

Abstract: An elevator car and a counterweight is suspended on a sheave by means of a rope in a well-rope faashion. In dependence on the number of passengers on the car, the sheave is applied with an unbalance torque making appearance between the car and counterweight. Upon starting of the elevator operation by releasing a brake, upward or backward bouncing of the car takes place due to the unbalance torque. For preventing such bouncing of the car, a start compensation is performed by generating a motor torque which can cancel out the unbalance torque in precedence to the releasing of the brake. The brake is installed swingably on a winding equipment. Displacement of the brake during actuation thereof indicates the presence of the unbalance torque.